1. R.R. Irving: Met. Forming, 2001, Mar., pp. 27–32.
2. J. Matsumoto and H. Mochizuki: Weld. Int., 1994, vol. 8 (6), pp. 438–44.
3. T. Saito, Y. Takahashi, and T. Nishi: Nippon Steel Tech. Rep., 1988, vol. 37 (4), pp. 24–30.
4. R.M. Rivett and S.A. Westgate: Met. Constr., 1980, vol. 12 (10), pp. 510–17.
5. M.A. Glagola and C.A. Roest: SAE Technical Report No. 760167, SAE, Warrendale, PA, 1976.